Subaru Legacy BN/BS (2015-2019) Service Manual: How to read wiring diagrams
1. POWER SUPPLY CIRCUIT Circuits are described to indicate the power supply in the wiring diagram of each system. “MB-5”, “MB-6”, etc., which are used as power- supply symbols throughout the text, correspond with those shown in the “DC POWER SUPPLY CIRCUIT” in the wiring diagram of each system. Accordingly, using the DC power supply circuit and the wiring diagram of each system permits service personnel to understand the entire electrical arrangement of the system.
2. WIRING DIAGRAM OF EACH SYSTEM (1) Fuse No. & rating The “Fuse No. & rating” is the same description as that in the DC power supply circuit, and corresponds with that used in the vehicle.
(2) Wiring diagram of each system To help figure out the route from the DC power supply circuit, wiring diagrams are classified and described in each system. NOTE: This manual includes harness information. Information of parts that are not routed via harness and adapter code is described as a reference. If no information is described in this manual, refer to each section.
• (A):Wire connection and crossing in a circuit
• (B):Classification by specifications If a circuit differs from another circuit according to vehicle specifications, the specification difference is indicated with abbreviations. • (C):Color code Indicates the color of harness and connector housing.
(Color code of harness) Single color is indicated with a color code, and double colors are indicated with “standard color / marking color”.
(Color code of connector housing) Used in the connector sketch and the locations.
• (D):Connection to another system in the same circuit Indicates the connecting to with alphanumeric characters, which correspond to the descriptions shown on the upper section of each page.
• (E):Connections in the system (A) indicates destination of this circuit, and (B) indicates a page corresponding to the destination.
• (F):Ground The ground points shown in the ground circuit refer to the following, which correspond to the locations.
• (G):Terminal No. Indicates the terminal number of the connector to be connected. If several connectors are connected to a component, they are identified with alphabetic characters.
• (H):Connector No. The first alphabetic characters of the connector number correspond with the following symbols that indicate harnesses or systems.
• (I) Connector sketch The connector sketch at the bottom shows the connectors used in the wiring diagram. (3) Connector The following shows the connector shape, lock position, connection and terminal number that are used in this manual. For connector shape, refer to the connector sketch.
• The sketch of the connector and the terminal number are indicated in a disconnected state which is viewed from the terminal side.
• The connector sketch usually indicates a female connector. • The connector used in the wiring diagram of the system indicates only the intermediate connection, therefore, no parts, J/Cs and grounds are described. In addition, if the different circuits are connected with the same connector, a dot line is used to indicate that these are the same.
• When connecting the connector, the terminals with the same number are jointed. When the connector is disconnected, the terminal location is symmetrical.
3. LOCATION In this manual, the location is classified in each harness, and the connector location is indicated using coordinates.
• The following connector symbols are used to easily identify the connectors.
• The ground point is indicated as follows.
4. SYMBOLS IN WIRING DIAGRAMS
5. ABBREVIATIONS IN THIS MANUAL
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